ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI%3DInChI%3D1S/C19H26N4O2/c20-13-15-9-11-17%2812-10-15%2923-19%2821-14-18%2824%2925%2922-16-7-5-3-1-2-4-6-8-16/h9-12%2C16H%2C1-8%2C14H2%2C%28H%2C24%2C25%29%28H2%2C21%2C22%2C23%29/file?format=sdf&get3d=True  -- InChI%3DInChI%3D1S/C19H26N4O2/c20-13-15-9-11-17%2812-10-15%2923-19%2821-14-18%2824%2925%2922-16-7-5-3-1-2-4-6-8-16/h9-12%2C16H%2C1-8%2C14H2%2C%28H%2C24%2C25%29%28H2%2C21%2C22%2C23%29 could not be loaded.